Shade-roller.



PATENTED JAN, 2, 1906.

L. T. BULLBY.

SHADE ROLLER.

APPLICATION FILED NOV.15, 1904.

wilbnmoaz NITE STATS ATEN IiFFICE.

SHADE-ROLLER.

To all whom it may concern:

Be it known that I, LOUIs T. BULLEY, a citizen of the United States,residing at New Haven, in the county of New Haven and State ofConnecticut, have invented certain new and useful Improvements in Shade-Rollers, of which the following is a specification, reference being hadtherein to the aceompanying drawings.

My invention relates to new and useful improvements in shade-rollers,and has for its object, among other things, the production of a deviceof this character that will be positive in its operation and constructedof few parts so designed as to be readily assembled and manufactured atthe minimum cost.

' To these and other ends my invention. consists in the shade-rollerhaving certain details of construction. and combination of parts, aswill be hereinafter described, and more particularly pointed out in theclaims.

Referring to the drawings, in which like numerals of reference designatelike parts in the several figures, Figure 1 is a longitudinal sectionalview of a shade-roller. Fig. 2 is a view of the cam-plate from theinside. Fig. 3 is a view thereof from the outside. Fig. 4 is a sideelevation thereof. Fig. 5 is a front elevation of the spring-disk. Fig.6 is a side elevation thereof, and Fig. 7 is a perspective view of thespear-bar.

In carrying out my invention I provide the usual roller 1, to which thecurtain is affixed in any of the many ways common to the art and havinga hole 2 in the end thereof, within which is held the spring-rod 3,having the coil-spring 4 affixed thereto at its inner end, as shown inFig. 1. Driven into the end of the spring-rod 3 is the spear-bar 5,which is provided with a plurality of radially-projecting wings 6,-which prevent the rotation of said bar within. said rod. (See Fig. 1.)Midway of the length. of said spearbar is the collar 7, havingdiametricallyopposed notches 8 therein, and in the periphery of saidcollar adjacent to the said recesses and diametrically opposite eachother are the recesses 9. The outer end of said. spear-bar is flattenedat 1.0, so as to enter the slot in the curtain-bracket, as is usual,to'prevent the rotation of said spear-bar and the spring attachedthereto. For further security and to prevent the splitting of thespring-bar 3 and the withdrawal of the spear-bar therefrom I provide aferrule 11, which encircles the said Specification of Letters Patent.Application filed Nov mber 15, 1904. Serial No. 232.750.

Patented J an. 2, 1906.

spring-bar and is provided with one or more detents 12 between the wings6.

The cameplate is designated 13 and is preferably formed of a circularflat body having .a hole 14 through the'center thereof of substantiallythe same diameter as the end of the spear-bar which passes therethroughand having diametrically-opposed cam-recesses 15, each of which recessesis rounded at both ends and having concentric sides of the same widthand diameter as the balls 16, which run therein. Projecting inwardly andat right angles to said body portion and preferably integral therewithare a plurality of lugs 17, each of which is provided with a prong 18.The spring-plate 19 is of substantially the same diameter as thecam-plate 13, being provided also with a hole 20 through the centerthereof of the same diameter as the shank 5 of the spear-bar and havingradial notches 21 therein to permit the wings 6 to pass therethrough.Said springlate is provided upon each of its sides wit a peripheralnotch 22 of substantially the same width as the prongs 18, andprojecting laterally from either side of said plate are the clips 23,between which and said plate the end of the coil-spring 4 is secured.

The several parts of my invention are as sembled as shown in Fig..1thatis, the spring-plate 19 is first placed upon the spearb-ar and the shankthereof driven into the end of the rod 3 after the ferrule 11 has beenplaced upon the end thereof. The detents 12 are then formed in theferrule between the ears 6. The spring 4 is affixed by securing one endto the inner end of the rod 3 in any preferred manner and the outerendbeneath one or both of the clips 23. The cam-plate is then placed inposition with a ball in each one of the cam-recesses 15, the prongs 18passing through the notches 22 and driven into the end of the roller,after which the ferrule 24, having the inwardly-turned lip at its outerend, is placed in position and completing the assembling operation.

In Fig. 2 I have illustrated the peripheral line of the collar 7 bybroken lines, and it will be there noted that one of the balls 16 is inthe upper of the two notches 8 and in that end of the cam-recess 15nearest the center, while the other of the balls 16 is occupying thatend of the cam-recess 15 nearest the periphery of the cam and out ofengagement with said collar. When the parts are in the position justdescribed, the roller is stationary and at rest. To actuate the same,the curtain is drawn down with a slight steady pull, which rotates thecam-plate about the spear and causes the upper ball 16 to ride upon theedge of the cam-recess 15, which lifts it out of the notch 8 and breaksthe rigid connection between the cam-plate and roll and the spear-barand its adjacent parts. The curtain may now be moved by causing the sameto travel at a speed sufificiently great to throw the balls withcentrifugal force to the outer end of the recesses 15, in which positionthey will travel around the collar 7 without engaging any of the notchestherein. As soon as the'curtain has been brought to the desired positionand its move ment is checked the upper of the balls 16 will drop bygravity to the lower end of the camrecess 15 and when the same registerswith the upper of the notches 8 will cause the same to enter therein,thus locking the parts together and preventing the further rotation ofthe roller. During the rotation of the cam-plate if the same is notbeing rotated with uniform and the requisite speed the balls will have atendency when the cam-re cesses are in their uppermost positions to rolldown through said cam-recesses and into the upper notch 8, and toovercome this tendency and to insure the operation of the device withoutmoving the curtain at the extreme speed I have provided the peripheralrecesses 9, which are adjacent to the notches 8. In operation as theballs 16 roll down through the cam-recesses 15 and strike the recesses 9they ride out of said recesses and are thrown up into the cam-recesses15 a sufficient distance to permit the cam-recesses 15 to pass the notch8 before gravity overcomes the movement of the ball and draws it towardthe centen There are many minor changes and alterations that can be madewithin my invention aside from those herein suggested, and I wouldtherefore have it understood that I do not limit myself to the exactconstruction herein shown and described, but claim all that falls fairlywithin the spirit and scope of=my invention.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

1. In a shade-roller, the combination with a roller; of a spring-barmounted therein; a spear-bar fixed to said spring-bar and having anotched collar thereon; a cam-plate fixed to the end of said roller,said cam-plate having a substantially lL-shaped cam-recess therein; aball operative therein; and means, as a plate, for preventing theaccidental dis: placement of said ball.

2. In a shade-roller, the combination with a roller; of a spring-barmounted therein; a spear-bar fixed within the end of said springbar andhaving a collar thereon provided with a notch having parallel sides anda recess in the periphery thereof; a cam-plate, having a substantiallyL-shaped cam-recess therein; a ball movably mounted within saidcam-recess; and a plate opposite said camplate.

3. The combination with the spear-bar, having a collar thereon providedwith a radial notch and a peripheral recess adjacent to said notch; of acam-plate, having a substantially L-shaped cam depression therein, saidcam depression being rounded at both ends and having sides concentricwith each other; a ball within said cam depression of substantially thesame diameter as the width thereof; and a plate opposite said cam-plate.

4. The combination with a spear-bar 5, having the collar 7 thereonprovided with a notch having parallel sides and a peripheral recessadjacent .to said notch; a cam-plate 13, having a substantially L-shapedcam depression 15 therein; a ball 16 operative within said depression;and a plate 19 opposite said cam-plate.

5. In a shade-roller, the combination with a roller of a spring-barmounted therein; a spear-bar fixed within the end of said springbar andhaving a collar thereon provided with a notch in the periphery thereof;a cam-plate having a cam-recess therein, which during its rotationpasses the bottom of the recess in said collar; aball within saidcam-recess; and a plate opposite said cam-plate.

6. In a shade-roller, the combination with a roller; of a spring-barmounted therein; a spear-bar fixed within the end of said springbar andhaving a collar thereon provided with a parallelsided notch in theperiphery thereof; a cam-plate upon one side of said collar having acam-recess therein, which during a portion of its rotation registerswith the recess in said collar; a ball within said cam-recess; and aplate upon the side of said collar opposite said cam-plate.

In testimony whereof I aifix my signature in presence of two witnesses.

LOUIS T. BULLEY.

Witnesses:

GEORGE E. HALL, JEssIE E. THOMAS.

ICC

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